Aldson and william t



UNrrnn STATES PATENT @erica ELISHA SHIVER, OF WASHINGTON, D. G.,ASSIGNOR TO ROBERT B. DON ALDSON AND WILLIAM T. KEENAN, BOTH OF SAMEPLAGE.

SHOT-MACHINE.

SPECIFICATION forming part of Letters Patent No. 271,374, dated January30, 1883.

Application tiled November 28, 1882.

To all whom tt may concern Be it known that I, ELIsHA SHIVER, a citizenof the United States, residing at Washington, in the District ofColumbia, have invented certain new and useful Improvements inShot-Machines; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains lo make and use thesame.

My invention relates to improvements in the apparatusfor the manufactureof what is termed drop-shot without the use and eX- pense of ashot-tower;.and the object is to produce a better quality and moreuniformshaped shot, and-to do this in an expeditious and economicalmanner.

My invention consists in certain new and useful improvements upon theinvention patented to me June 8, 1880, No. 228,481, and it is mainly inthe improved manner of imparting a vibratory motion to the sieve-fra meby means of laterally-arranged rubber springs instead of spiral orelliptic springs, which give an uneven motion.

It also consists in certain details of coustruction, all of which willbe more fully described hereinafter, and more specilically pointed outin the claims, reference being had to the accompanying drawings and theletters'of reference marked thereon.

Like letters refer to like parts in the difierent figures ofthedrawings, in which- Figure 1 represents a pla-n view of my inachine.Fig. 2 is a longitudinal section on line a: m.

In the drawings,'A is a frame, to be placed or adjusted upon thewater-tank in which the shot are to be cooled. Upon this frame issuspended the sieve-frame B by means of two springs, C, made of rubberand preferably ot' tube form, so as to impart greater elasticity tothem. It is loosely secured to the frame by screws b, so that it canloosely vibrate around them. A sieve-box, D, similar to that shown in myformer patent, is attached to the sieveframe, and between them is placedthe bottom d, made preferably of mica. In these (No model.)

,parts are arranged a series of holes, 1, 2, and 3, through which themetal and the shot pass into the water-tank T. On each end of thesieve'frame are arranged a series of corrugations or serrations, e, withwhich the wheels or rollers E E engage. These wheels are corrugated orfluted, and are journaled in suit# .able bearings, F, and are arrangedso as to revolve toward each other by means of a crossbelt, G, so thatthe shot are shaken toward each other instead of from each other, as inmy former patent. The bottom is provided with holes of different sizesto suit the size of shot it is desired to make.

The machine may be operated by means of a hand-wheel, H, or by steam orother power.

I prefer to place two cross-bars, a, under the central part of the sieveto strengthen it.

Any suitable metal may be employed for the purpose of making the shot.

The operation is as follows: Molten metal (lead, 85e.) is poured uponthe central part of the sieve-box, and tiows around over the snrfacethereof', when the drops or pellets of metal drop through theperforations and fall immediately into the water, and are retained inthe suspended sieve. At the same time a vibrating motion-.is imparted tothe sieve-frame by means of the uted rollers and the serrations c onsaid frame and the rubber springs O, whereby the molten metal in thesieve-box is kept in a constant agitation or vibration, thus insuring`its proper discharge through theA sieve. The shot are then placed intapolishing-machine, where they receive a constant rolling motion, and aremade perfectly round while being polished at the same time, thus forminga Very superior quality of shot.

Having thus described my invention, what I claim, and desire to secureby Letters Patent,

isl l. Ina shotmachine, the combination of the cylindrical rubbersprings with the vibratory frame and sieve-box with a perforated bottom,d, arranged substantially as specified.

2. The combination, in a shot-machine, of the vibratory frame B andsieve-box D, having mica bottom d, perforated as shown, with thecylindrical rubber springs C and tlie tinted belt, G, substantially asnud for the purpose rollers E, substantially us and for the purposespecified. io herein set forth. In testimony whereof I hereby ax my sig-3. The combination of the vibrntory frame nature in presence of twowitnesses. supported at each end upon cylindrical rubber ELISH A SHIVER.

springs, and operated by means ofuted roll- W. T. KEENAN,

ers acting upon serrated portions on the vibra.-

tory from e, an d seid rollers operated by across- ALEX. SIMON.

